<!DOCTYPE html>
<html lang="en">
<head>
    <meta charset="UTF-8">
    <title>盒子轮廓</title>
    <style>
        .Box{
            width:200px;
            height:200px;
            background-color: #0ff;
            outline:5px dashed #f00;
            border:2px solid black;
        }
        input{
            /*border:none;*/
            outline:none;
        }
    </style>
</head>
<body>
<div class="Box"></div>第聂伯河放假
<input type="text" value="登录">
</body>
</html>